1) King David was anointed as a young teenager to be king but did not become king of all Israel until he was 30 years old. During this time, he faced many challenges as he was hunted by King Saul.
2) David learned important lessons during this time about depending on God, being consistent in his faith, and valuing people that prepared him to become a great king.
3) As king, David was a caring leader who knew each of his soldiers personally, empowered them, and fought bravely alongside them, leading to many military victories.